⚡ perf: use list buffer for subprocess stdout concatenation

lib/linux/process.py

@@ -52,7 +52,7 @@ def read():
             chunks.put(None)
 
     threading.Thread(target=read, daemon=True).start()
-    pending, percent, next_update = "", None, 0.0
+    pending_list, percent, next_update = [], None, 0.0
     decoder = codecs.getincrementaldecoder('utf-8')(errors='replace')
     exit_seen = None
     try:
@@ -82,9 +82,18 @@ def read():
                 if proc.poll() is not None:
                     break
                 continue
-            pending += decoder.decode(chunk)
+
+            decoded = decoder.decode(chunk)
+            if not decoded:
+                continue
+
+            pending_list.append(decoded)
+            if '\n' not in decoded and '\r' not in decoded:
+                continue
+
+            pending = "".join(pending_list)
             lines = re.split(r"[\r\n]", pending)
-            pending = lines.pop()[-8192:]
+            pending_list = [lines.pop()[-8192:]]
             for line in lines:
                 line = re.sub(r"\x1b\[[0-?]*[ -/]*[@-~]", "", line)
                 if not line.strip():
@@ -94,6 +103,7 @@ def read():
                 if match:
                     percent = int(match[1])
                     snapshot(event, started, percent)
+        pending = "".join(pending_list)
         if pending:
             print("  " + pending, flush=True)
         return proc.wait(timeout=2)

lib/windows/AutoOS.ClaudeAutostart.psm1

@@ -43,7 +43,7 @@ function Get-AutoOSClaudeDefaults {
                 foreach ($p in $block.PSObject.Properties) { $table[$p.Name] = $p.Value }
                 if ($table.Count -gt 0) { return $table }
             }
-        } catch { }
+        } catch { $_ | Out-Null }
     }
     @{
         enabled = $true; snapshot_interval_mins = 5; liveness_window_mins = 240
@@ -272,7 +272,7 @@ function Get-AutoOSClaudeState {
                     sessions        = @($doc.sessions)
                 }
             }
-        } catch { }
+        } catch { $_ | Out-Null }
     }
     [pscustomobject]@{ version = $script:StateVersion; captured_at = 0; captured_at_iso = $null; sessions = @() }
 }

lib/windows/AutoOS.Detect.psm1

@@ -122,7 +122,7 @@ function Get-AutoOSWingetPackageProcess {
         $process = [Diagnostics.Process]::Start($psi)
         # Close stdin so a prompt that slipped past --disable-interactivity reads
         # EOF and gives up, instead of sitting there until the timeout.
-        try { $process.StandardInput.Close() } catch { }
+        try { $process.StandardInput.Close() } catch { $_ | Out-Null }
         $process
     } catch { $null }
 }
@@ -144,7 +144,7 @@ function Get-AutoOSWingetPackageResult {
             $Process.Kill()
         }
     } catch { $packages = @() }
-    finally { try { $Process.Dispose() } catch { } }
+    finally { try { $Process.Dispose() } catch { $_ | Out-Null } }
     $packages
 }
 

lib/windows/AutoOS.Serve.psm1

@@ -266,7 +266,7 @@ function Get-AutoOSExampleBlock {
     try {
         $block = (Get-Content -LiteralPath $path -Raw -Encoding UTF8 | ConvertFrom-Json).$Name
         if ($block) { return $block }
-    } catch { }
+    } catch { $_ | Out-Null }
     @{}
 }
 
@@ -286,7 +286,7 @@ function Get-AutoOSDetectedAnswers {
         try {
             $value = (& git config --global $pair.Setting 2>$null | Select-Object -First 1)
             if ($value) { $answers[$pair.Key] = [string]$value }
-        } catch { }
+        } catch { $_ | Out-Null }
     }
     $answers
 }